Rear hydraulics on 770?

[NickTaylor]

One more question - after I purchased this tractor, I called the dealer who sold it with the serial number to see what they could tell me. Dealer says that this tractor has "dual SCVs," which they say means it was delivered with the rear hydraulics already installed. I'll be darned if I can see anything that looks like a rear hydraulic setup on this machine. Anyone have a picture of the rear hydraulic hookups on a 770 so I know what to look for?

Thanks again,
Nick

 

[kennyd]

The "Dual SCV's" he is referring to are for the loader, controlled by the joystick.

 

[NickTaylor]

That makes more sense. But if anyone has pics of rear hydraulics installed on a 770 I'd still appreciate it. I might consider installing the power beyond option...

 

[JD5210]

You might want to goto machinefinder.com, tractorhouse.com, fastline.com for pictures.

I would guess the hydraulic connections are mid-mount on left side ie under or by the steps since as KennyD indicated dual-scvs are normally for the loader. KennyD also supplied you with the URL for JD parts you might want to look there also for a picture.

 

[grsthegreat]

One more question - after I purchased this tractor, I called the dealer who sold it with the serial number to see what they could tell me. Dealer says that this tractor has "dual SCVs," which they say means it was delivered with the rear hydraulics already installed. I'll be darned if I can see anything that looks like a rear hydraulic setup on this machine. Anyone have a picture of the rear hydraulic hookups on a 770 so I know what to look for?

Thanks again,
Nick

Mine is on a JD 870 (same difference) . The rear power beyond is a set of coupler ports located behind the seat. In my picture you can see the 2 hoses going up to the right rear fender where a prince set of valves are located. real obvious if you have it.
I installed them myself, took about 1-1/2 hrs and had to remove the seat. You remove the bolts where existing hydraulics feed into the tractor, add the kit with new extended flow bolts and bushings. wasn't hard at all. The kits may be hard to find nowadays though.

 

[Villengineer]

If you have the DSCV I would add plumbing to have rear ports. That's what I have done. You can buy a kit from JD, but they are $$. They also come up on the auction site occasionally. I'll try and remember to get a pic of my set-up and post it tonight. Anyway, unless you are planning to run a back-hoe I wouldn't add a power beyond kit. They are $$, especially for what they are, and you have to either add control valves or the implement has to have them. (like a BH would) Just my .02.

 

[Villengineer]

Pics of rear remotes using DSCV:

 

[Tractor Pilot]

Nick,

When I bought my JD770 last fall, the JD dealer also incorrectly told me that dual SCV meant that I had rear remotes. Dual SCV means that the joystick for the loader can do two functions at the same time (i.e. raise loader and dump bucket). You can perform two functions on the loader by moving the joystick to one of the four diagonal positions.

There are two JD kits available to have hydraulic outlets in the rear of the JD770 tractor:

One is what Villengineer posted - run flexible lines from the loader outlets to the rear of the tractor. The postive side of this kit is that you can use the loader joystick to control the rear outlets. The negative side is that you can't use the loader at the same time you are running the rear outlets.

The second is to run hard lines to the rear of the tractor (see my pictures). The positive side is that you can use the loader while having rear hydraulics. The negative side is that you have to buy and install another joystick (like what gsrthegreat posted) or use one that comes with an implement (i.e. log splitter, backhoe, etc.). JD doesn't make another joystick for the JD770, so you have to buy an aftermarket "open center" joystick.

The rear auxillary hydraulic line kit from JD took me a few hours to install. The directions that came with the kit was good and had pictures. I currently don't own any rear implements that need hydraulics, but I plan to in the future (top-n-tilt). I also thought it was a good idea to install the kit before they are unavailable.

Bruce

 

[NickTaylor]

Bruce,

If you don't mind me asking, what does that option cost? Do the dealers still sell the kits or do I have to search auction sites, etc?

Thanks!
Nick

 

[Villengineer]

You can use the SCV for both the loader and rear remotes at the time. You split the circuit you want to use in both places by using a solenoid valve and a momentary contact switch. I have all the parts to do that to mine, but haven't needed to spit the circuit yet so I haven't installed it. Significantly less expensive than buying and installing the power beyond kit, an aftermarket control valve, and the associated plumbing. This is a very common way to spit functions on equipment.

 

[Tractor Pilot]

Nick,

I ordered the JD kit (18005) from my local JD dealer back in November 2010. As of then the kit was available. I think it cost around $290.

I don't think the JD kit (18046) is as critical if they become unavailable because you could custom make your own rear quick coupler kit that plugs into the loader outlets.

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JD770 Rear Hydraulic Kits (2)

1. BM18046 - JD kit (rear quick coupler kit) that has flexible lines from loader outlet to rear of tractor.

2. BM18005 - JD kit (rear auxillary hydraulic line kit) that has hard lines to rear of tractor.

Bruce

 

[Tractor Pilot]

Villengineer,

The pictures you posted - was that the JD rear quick coupler kit (18046) or did you make that custom?

Bruce

 

[Villengineer]

Villengineer,

The pictures you posted - was that the JD rear quick coupler kit (18046) or did you make that custom?

Could you provide some more details about the solenoid valve and momentary contact switch. Any pictures? Who sells these?

If I could get the loader to work at the same time as the rear outlets, I would consider installing that kit (18046) too or custom make my own. I mean, why not have both kits installed and have the best of both worlds?

Bruce

What I have pictured is custom. I've since bought the JD kit but haven't installed it. I picked it up for less than the fittings cost. I'll get around to it sometime.

I don't have this exact switch, but the Crouzet 83123018 (allied elect) is very similar. Wire it to the solenoid valve as a NO switch and mount it on the side or front of your SCV handle. When you want the rear hydraulics you push the button and actuate the handle.

Any solenoid "circuit selector" valve will work. You can do it with a single 6 port valve or with a pair of 3 port valves. (HydraForce SV10-31 would be an example) I have several of both types and eventually will put one of the set-ups on my tractor. I have to find a loader I can afford first.